There are two ways.

1 is to collect some of their money to pay for your two-day tour, and then make more refunds and less supplements according to the actual situation of the expenses.

2 is that the travel agency will pay in advance and then settle with them one by one after the tour is over.

The first method is often adopted now, because it is easier to settle accounts; The second method is also possible, but it should be noted that you must sign a legally binding document with the tourists before the tour, and then you can settle all kinds of expenses with the tourists according to this legally protected document after the tour, and of course you need to provide some exact restaurant invoices, hotel invoices and other things.